Abstract
In this work, four novel metal–organic frameworks [Cd(bipa)]n (1), {[Zn2(bipa)2]·2C2H5OH}n (2), {[Co(bipa)]·C2H5OH}n (3), {[Ni(bipa)2]·2DMA}n (4), (H2bipa = 5-(benzimidazole-1-yl)isophthalic acid) were successfully synthesized under solvothermal conditions. Complexes 1–4 were characterized by powder X-ray diffraction, elemental analysis, infrared spectroscopy and thermogravimetric analysis. Interestingly, the coordination patterns and 3D network structures of complexes 1–3 are very similar, while complex 4 is relatively unique. Complexes 1–2 exhibit potential fluorescent properties. Complex 1 can selectively and sensitively detect trace Fe(iii) and Cr(vi) in water by fluorescence quenching detection, and the quenching mechanism is further discussed.
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